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V8-8.1L

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Power brake booster is leaking
Hello, a brake booster is an important part of the braking system, and should be repaired sooner than later. Since the brake booster uses vacuum to assist in applying the brake pedal, if the vacuum leak becomes too great, it...
Question
I came from work and thermostat was how it should be then I got home and turn the engine off but had the ignation on been off and
Hi there, thanks for writing in. It sounds like your concern is the leaking antifreeze with the ignition on, engine off. Leaking coolant is never a normal condition on any car, even if it's remotely modern. Anytime there is leaking...
Question
Reduced power mode
The reduced power mode is usually related to a Check Engine or ABS light coming on. When a problem is detected, the engine goes into reduced power mode to try and allow you to get to a safe stopping point....
Question
My car seems like it's flooding when you start it even though it's fuel injected? Why would this be?
Hi there, thanks for writing in. The amount of fuel injected into your engine is controlled by the PCM, with several inputs from various sensors on the engine. One of the most important inputs is the coolant temperature sensor, and...
Question
Truck keeps cutting out when driving - 2001 Chevrolet Silverado 2500
Hello there, many different faults could cause your 2001 Chevrolet Silverado to cut out and die while running. The most common would be an alternator, battery, wiring harness fault, fuel pump, battery cable, vacuum leak, spark plugs, or a coil....
Question
Leaking oil or consuming oil.
It's possible that your engine is burning oil, either through the head gasket or through the rings. If this was the case, you would most likely be seeing blue gray smoke out of the tailpipe when driving. If you're not...
Question
My ignition switch doesn't start don't turn
Hi there. If the ignition won't turn when you insert the key, it's likely that the ignition lock cylinder is damaged and needs to be replaced. However, it could be an issue with the steering column as well, which is...
Question
Brake light on right side doesn't work. Not the bulb and the contacts are not corroded.
Hi there. If the brake light bulb and the contacts on the tail light are good, the next item to check would be the fuse that controls that light or the relay that sends the signal to the tail lights....
Question
Reduce Engine Power Light is illuminated
This light comes on generally when there is a critical system failure or problem with the engine or transmission. The purpose of this light is to keep the driver safe and to prevent potential major damage to the engine or...
Question
transmission
Hi there. It would probably be smarter to trade it in as is, rather than trying to repair the issue. To be honest, your trade-in value at a dealership is probably going to be less than the "value" of the...
Question
Broken crankshaft position sensor
It depends on where the sensor broke as to whether it can still be removed. In most cases, a professional mechanic would remove multiple components that would make it easier to access. Once it's clear, you can usually use a...
Question
How much will it cost to have a mechanic fix it?
Billing question was sent to CS for the cost of replacing the crankshaft position sensor on a 2001 GM Sierra 2500 HD with a V8-8.1 engine.
Question
My car says the door is ajar but it really isn't
One of the more common causes of a false "door ajar" warning light is stuck contacts in the electrical switch in the door pillar. The switch can be tested. Sometimes the switch can be cleaned or serviced but that can...
Question
Truck won't start
Hi There, Depending on whether or not the vehicle will turn over will determine what the next step should be. If the engine does not turn over, I would recommend checking all connections related to the battery and check to...
Question
I'm rebuilding my engine.
Depending on what you plan on doing with your vehicle for off road will determine what ratio you want. If you plan on going slow and rock climbing, then I recommend putting in a 4:56 gear ratio. If you plan...
Question
Idles but when driving it acts like its out of fuel.
Check all of the battery ground cables to the car on the battery, engine, and chassis. There is a bad ground somewhere that is causing the ECM to not work properly. This would cause the fuel pump to not work...
Question
Hard to start, low on idle, no code found.
What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and...

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